NO. 2 OSBURN: eastern pacific BRYOZOA — CHEILOSTOMATA 481 



Smftt described the species from west of the Tortugas Islands, 

 Florida, and Canu and Bassler listed it from the West Indian region 

 and Brazil. The Pacific coast specimens appear to present no essential 

 differences. 



Hancock Station 423-35, off Port Utria, Colombia, 12 fms, encrust- 

 ing corallines, five small colonies. 



Family PhylactellidaC Canu and Bassler, 1917 



"The ovicell is very large and closed by a special membrane. The 

 special ovicell which Waters called recumbent is placed on the distal 

 part of the zooecium itself between the apertura and the distal zooecium. 

 Evidently it is also more or less supported on the distal zooecium, but 

 frequently it is completely separated from it." (Canu and Bassler, 1920: 

 573). 



Genus PHYLAGTELLA Hincks, 1879, (in part). 



"Zooecia with the primary orifice more or less semicircular, the lower 

 margin usually dentate ; peristome much elevated, not produced or chan- 

 nelled in front No avicularia." (Hincks, 1879:161). 



To this description Canu and Bassler (1920:573) added the follow- 

 ing characters: frontal a tremocyst with small pores; the thick band 

 of the operculum is a little distance from the edge; no spines; a lyrule 

 or cardelles present ; the aperture more or less circular ; peristome more 

 or less funnel-shaped. 



The genus, more recently, has very properly suffered much from 

 amputation, and of the three species selected by Hincks, Alysidota labrosa 

 Busk has a porous frontal and a lyrula and has been returned to Alysidota 

 Busk (preoccupied and renamed Alysidotella by Strand) as the genotype 

 of that genus. Also the third species, Lepralia eximia Hincks, has a porous 

 frontal and a lyrula and has been removed. This leaves only Lepralia 

 collaris Norman, which has been selected as the genotype. The fossil 

 species described by Canu and Bassler (1920:573) all have the porous 

 frontal and appear to belong more properly to Alysidotella. 



The genus Phylactella may be redescribed as follows : 



Zooecia with the primary aperture more or less rounded ; cardelles 

 small; frontal a pleurocyst with small, well-spaced areolar pores; the 

 secondary peristome (developed from the frontal) high and flaring prox- 

 imally and on the sides, but entirely wanting on the distal border. Ovicell 



